Fitting the Mechanics

Here you can see the 700 Electric mechanics mounted to a plate with registration holes.  This allows me to easily install the mechanics in the fuselage, and ensures absolutely accurate repositioning every time. The plate is secured to the fuselage with 6 M4 bolts, so it will be very rigid.  You can also see the twin primary BEC units for power distribution, as well as the tiny 10 CFM Fan mounted atop the ESC. 

RC Heli's fly at an angle, as the tail rotor is lower than the main rotor.  The main rotor is lifting the heli, and the tail rotor is pushing sideways to counteract torque.  Since the tail is lower than the main rotor, the tail thrust imparts a "lean" to the heli in flight.  In order to counteract this, the base plate has an angle to offset this effect.  The mechanics have to be mounted off-center at the bottom, so the rotor is centered at the top, where the shaft leaves the fuselage. 

You can also see above, the monster 400 oz/in servos used for the landing gear.  Using proportional servos, rather than retract servos allows me to slow them down with my JR 12X transmitter, so they will operate realistically.  Robart retracts have a locking mechanism, so the servos do not have to "work" to keep them fully up, or down.

Above, you can see the mechanics temporarily mounted.  The main rotor is perfectly centered at the top of the heli, but with a slight angle to counteract the "leaning" effect.  I took a lot of photos of my 700 in flight, and overlaid a protractor in Photoshop in order to calculate the initial angle.  The plate is an epoxy filled sandwich of plywood sheets, and can be replaced with a different angle if needed.

You can also see the extensive, lightweight carbon fiber reinforcements surrounding the cockpit window openings, as well as the fuselage.